Large animal models for investigating the applications of photodynamic therapy

Area of Science:

• Biomedical Engineering
• Oncology
• Photochemistry

Background:

• Photodynamic therapy (PDT) is a promising minimally invasive treatment using photosensitizers, light, and oxygen to generate reactive oxygen species (ROS) for targeted cell death.
• Current limitations include photosensitizer selectivity, limited light penetration, and potential off-target effects, hindering widespread clinical adoption.

Purpose of the Study:

• To review the diverse applications of PDT across various disease models, focusing on advancements and challenges.
• To emphasize the significance of preclinical animal models, particularly large animal models, in evaluating PDT efficacy, safety, and mechanisms for clinical translation.

Main Methods:

• Review of existing literature on photodynamic therapy applications and research methodologies.
• Analysis of the role and advantages of different experimental animal models, including large animals, in PDT studies.
• Discussion of strategies for optimizing PDT, such as novel photosensitizers, nanotechnology, and combination therapies.

Main Results:

• PDT shows therapeutic potential in oncological, infectious, and other disease models.
• Advancements in photosensitizer development, nanotechnology, and combination therapies are expanding PDT's capabilities.
• Large animal models offer a more translatable platform for studying PDT mechanisms and outcomes compared to small animal models.

Conclusions:

• Selecting appropriate preclinical animal models is crucial for the successful clinical translation of PDT.
• Further research utilizing advanced animal models will refine PDT parameters and accelerate its integration into clinical practice.
• Continued innovation in PDT approaches promises to overcome current limitations and broaden its therapeutic reach.